High effieiency scroll compressor with spiral compressor blades of unequal thickness

ABSTRACT

The present invention provides a high efficiency scroll compressor with spiral compressor blades of unequal thickness, using unfolding logarithmic spirals configured to satisfy a gear engaging condition, that is, spirals of unequal thickness serve as compressor blades, thereby providing high gas compression ratio, and high compression efficiency, to achieve the objectives of energy conservation and carbon reduction.

BACKGROUND OF THE INVENTION

(a) Field of the Invention

The present invention provides a high efficiency scroll compressor withspiral compressor blades of unequal thickness, which is used in cold air(storage) compressors to increase efficiency thereof, and therebyachieve the objective of energy conservation and carbon reduction.

(b) Description of the Prior Art

Recent advances in technology have enabled the manufacture of manyexcellent products, one excellent invention being the air conditioner.And temperature build-up caused by global climatic shift of recent yearsis necessitating the installation of air conditioners in every home.However, the excessive use of air conditioners not only consumes power,but is also, because the liquid coolant used by air conditioners resultsin damage to the environment, one if the reasons for global temperaturebuild-up. Presently, there is not one country in the world that is notimplementing means to protect the environment, save energy and reducecarbon emissions. Hence, increasing compressor performance of cold air(storage) compressors is without doubt a feasible plan for improvementthereof.

Scroll compressors have been on the market for nearly 30 years, and havebecome the main force product for small and medium sized airconditioners. The scroll compressor comprises a compression chamberprimarily formed from a symmetrical assembly of two scrolls consistingof a moving and a stationary involute scroll. Operating strokes are asfollows: 1. intake stroke; 2. low compression stroke; 3. mediumcompression stroke; 4. high pressure discharge stroke (refer to FIG. 1);with the radial forces produced by the compressed gas mutuallycanceling. Compared to other types of compressors, the scroll compressorprovides multiple advantages, including large volume, high efficiency,high reliability, low noise, few components, simple operating principle,and low cost; and is generally acknowledged by the industry as a productprovided with the most development potential. Although the scrollcompressor is provided with the aforementioned many advantages, it wouldbe welcome news for the industry if compressor performance could beincreased.

However, how to design a high performance scroll compressor that bringsinto full play its superior capabilities is presently an active researchdirection for manufacturers. As for the current situation, one afteranother large international manufacturers of compressors are applyingfor patents to protect self-interests, thereby restricting subsequentmanufacturers from entering the market, and thus imposing restraints oninnovation. Hence, how can subsequent manufacturers survive under suchstringent conditions? Only by overcoming traditional innovative thinkingcan new inventive ideas be initiated. In essence, up to the present timethe inventor of the present invention has not seen any related reports,articles or the appearance of any products on how scroll compressors canbe made to produce a higher compression ratio to increase thecompression effectiveness thereof. In view of this, the inventor of thepresent invention being beset by the aforementioned deficiency, proposesa new invention to resolve and surmount existent technical difficultiesto Improve functionality of scroll compressors of the prior art.

In order to increase performance, the inventor of the present inventionanalyzed involutes as base curves to derive the development of spiralsof unequal thickness to serve as scrolls, and investigated into thecharacteristics of scroll compressors, as well as carrying out anexploratory comparison of a logarithmic spiral 100 and an Archimedes'spiral 200 with a base circle involute 300 (refer to FIG. 2).

The aforementioned research and experimentation, after untold hardships,and carrying out innumerable experiments with countless failures andrepeated modifications, finally came to fruition in the development of asolution to the foregoing problems and shortcomings, and primarily usesunfolding logarithmic spiral scroll compressor blades, that is, spiralsof unequal thickness are used to serve as scroll compressor blades.Compression efficiency can be increased by merely replacing the bladesof a compressor, thereby resolving long standing insurmountableproblems, and achieving the objectives of energy conservation and carbonreduction.

SUMMARY OF THE INVENTION

The present invention provides a high efficiency scroll compressor withspiral compressor blades of unequal thickness, which is used in cold air(storage) compressors to increase efficiency, achieving energyconservation and carbon reduction.

The high efficiency scroll compressor with spiral compressor blades ofunequal thickness of the present invention uses unfolding logarithmicspirals, which are configured to satisfy a gear engaging condition, thatis, spirals of unequal thickness are used to serve as compressor blades.And the objective of increasing compression efficiency is achieved bymerely replacing the blades of a compressor.

To enable a further understanding of said objectives and thetechnological methods of the invention herein, a brief description ofthe drawings is provided below followed by a detailed description of thepreferred embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a drawing depicting compression strokes of a scroll compressorof the prior art.

FIG. 2 is a drawing depicting an exploratory comparison of line forms ofan Archimedes line, a logarithmic line and a base circle line.

FIG. 3 is a structural view depicting a compressor of the presentinvention.

FIG. 4 is a schematic view depicting logarithmic spiral blades of thepresent invention.

FIG. 5 is a structural view depicting the logarithmic spiral blades ofthe present invention.

FIG. 6 is a structural view depicting the involute interior andlogarithmic spiral exterior of the blades of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring first to all the drawings, the present invention provides ahigh efficiency scroll compressor with spiral compressor blades ofunequal thickness, which is used in cold air (storage) compressors toachieve the objective of increasing efficiency thereof. Implementationof the present invention is described hereinafter:

The high efficiency scroll compressor with spiral compressor blades ofunequal thickness of the present invention (see FIGS. 3 and 4) comprisesa scroll compressor main body 1 provided with a bottom cover 2 and abase 3 at a lower end thereof, an encircling outer casing 4 forming aholding space, an eccentric shaft 5 is fitted close to the center of theinterior of the holding space of the outer casing 4 and is configuredperpendicularly between the upper and lower ends thereof, a motor rotor6 and a motor stator 7 are formed on the periphery of the eccentricshaft 5, a framework 8 is mounted on another end of the eccentric shaft5, an Oldham ring 9 fitted to the framework 8 is an anti-autorotationmechanism, a winding scroll 10 is coupled to the end of the eccentricshaft 5, and a fixed scroll 11 is retained within the winding scroll 10.An upper cover 12 is formed on an upper end of the fixed scroll 11 toenable covering thereof; moreover, the upper cover 12 is provided withan outlet pipe 13. Furthermore, the outer casing 4 is provided with aninlet tube 14 at another appropriate place thereof. In addition, theouter casing 4 is fitted with a power supply connector 15 at anappropriate place thereof to enable connection to a power source. Theabove components make up a complete compressor, and apart from theaforementioned fixed scroll 11 and the winding scroll 10, all the othercomponents belong to the prior art.

In which, the fixed scroll 11 and the winding scroll 10 form unfoldingbase circle scrolls around a base circle center. The length of thescroll ρ=a·θ^(b); a is a fixed constant, a>0, and b is an exponent. Whenb<1, then the separation distance gradually decreases; when b=1, then astandard involute unfolds, and when b>1, then the separation distancegradually opens up.

The logarithmic equation is:

x=a·θ ^(b)·cos θ

y=a·θ ^(b)·sin θ

Because the fixed scroll 11 and the winding scroll 10 are assembled as aset, and a 180° phase difference is formed between the two scrolls,thus, a second scroll line is:

x=−a·θ ^(b)·cos θ

y=−a·θ ^(b)·sin θ

The geometric design of both the aforementioned fixed scroll 11 and thewinding scroll 10 is based on an unfolding logarithmic spiral scrollblade, that is, they form compressor blades of unequal thickness (seeFIGS. 4 and 5), also called logarithmic spiral blades 16. In otherwords, the smallest blade thickness is at the internal center, and getsthicker as the logarithmic spiral scroll blade unfolds (see FIG. 5).Moreover, there is a space between adjacent blades, and the space stillexists when the fixed scroll 11 engages with the winding scroll 10, thisbeing the space used to contain compression liquid, and is also thespace used for compression work. During operation, compression is thesame as that for traditional involute scrolls, that is, the compressionliquid is compressed starting from the periphery towards the internalcenter of the scroll, thereby achieving a high compression ratio output.Experiments have shown that the present invention is able to increasecompression efficiency by approximately 14%, thereby far exceedingperformance of traditional involute scroll compressors. Hence, thepresent invention surpasses traditional involute scroll compressors withits superior compression efficiency and complete innovative design.Through conception, experimentation, and configuration of thecomponents, the present invention is provided with multiple advantages,including being elaborate, saving space, easy assembly, saving onmaterials, durability, and low cost. Furthermore, merely replacing thecompressor blades enables increasing compression efficiency, therebyachieving the objectives of energy conservation and carbon reduction.Hence, the present invention provides high economic benefits and is ofindustrial development value.

In addition, because the geometric design of both the fixed scroll 11and the winding scroll 10 of the present invention is based on anunfolding logarithmic spiral scroll blade, that is, they form compressorblades of unequal thickness, also called logarithmic spiral blades 16,thus, the internal blade is the thinnest portion, which graduallybecomes thicker towards the external part of the blade. Such a design isgenerally applicable; however, if the strength of the internal structureis inadequate, then another configuration can be incorporated, wherebythe thickness of the internal blades is increased to improve thestrength of the scroll blades. Such a configurational change involvesapplying involute blades of increased thickness, that is, involutelinear blades 17 are on the inside, while logarithmic spiral blades areon the outside, both constituting applicable blades (see FIG. 6),thereby resolving the problems associated with the weakest portions ofthe blades, and completely bringing into full play the advantages of thepresent invention.

In conclusion, the present invention is an innovative design that usestechnological ideas of physical laws to completely overcome traditionalthinking and provide a new product provided with originality,advancement, and industrial application, thus complying with theessential elements as required for a new patent application.Accordingly, a new patent application is proposed herein.

It is of course to be understood that the embodiments described hereinare merely illustrative of the principles of the invention and that awide variety of modifications thereto may be effected by persons skilledin the art without departing from the spirit and scope of the inventionas set forth in the following claims.

What is claimed is:
 1. A high efficiency scroll compressor with spiralcompressor blades of unequal thickness, applicable for use in cold air(storage) compressors, comprising: a scroll compressor main body, oneend of the scroll compressor main body is fitted with a fixed scroll anda winding scroll, the fixed scroll and the winding scroll mutuallyengage, and provide a holding space; wherein the fixed scroll andwinding scroll are both unfolding logarithmic spiral scroll blades,having compressor blades of unequal thickness; thereby enablingcompressing a compression liquid to achieve the objective of highcompression ratio and compression work.
 2. The high efficiency scrollcompressor with spiral compressor blades of unequal thickness accordingto claim 1, wherein the fixed scroll and the winding scroll are bothunfolding logarithmic spiral scroll blades, having compression blades ofunequal thickness, wherein the fixed scroll and the winding scroll bothform an unfolding base circle scroll around a base circle center; thelength of the scroll ρ=a·θ^(b); a is a fixed constant, a>0, and b is anexponent; when b<1, then the separation distance gradually decreases,when b=1, then a standard involute unfolds, and when b>1, then theseparation distance gradually opens up; the logarithmic equation is:x=a·θ ^(b)·cos θy=a·θ ^(b)·sin θ a second scroll line is:x=−a·θ ^(b)·cos θy=−a·θ ^(b)·sin θ
 3. The high efficiency scroll compressor with spiralcompressor blades of unequal thickness according to claim 1, wherein thefixed scroll and the winding scroll are both unfolding logarithmicspiral scroll blades, having compression blades of unequal thickness,wherein in order to increase structural strength of the interior of theblades, the interior is changed to involute linear blades, and theexterior are logarithmic linear blades, both constituting applicableblades.